Optimization Design Of Xiandai·Aocheng Foundation Pit Supporting Structure In Handan City

In recent years, China’s economy has a leap type development, and subsequentlythe urban construction reach to a new level. At present, in city，there are many deepfoundation pit engineerings for underground malls, underground parking garages andunderground transportation hubs arised. That is typical better utilization of undergroundspace. Although many deep foundation pit engineerings in our country havesuccessfully completed,the deep foundation pit engineering accidents frequentlyhappen.As a result, the choice of supporting structure is the top priority.In this paper, the selection of deep foundation pit supporting structure in urbanconstruction is discussed. Deep foundation pit engineering is an discipline with manyuncertainty elements. Its theoretical knowledge is complicated and it involves soilmechanics, surveying, structural mechanics, material mechanics, engineering geologyand other disciplines. It is also affected by many factors, including natural and humanenvironment surrounding it, hydrogeological conditions and economic conditions, etc.In addition, it also requires that the staffs have rich experience in the practice, and calm,decisive quality when get into trublue.This paper first introduces the development of deep foundation pit supportingengineering and research status at home and abroad now, cited the use of the advantagesand disadvantages of several common supporting methods and there conditions of usage,summarizes optimization design steps of the foundation pit supporting structure; Then,combined with xiandai·aocheng foundation pit engineering in handan, preliminaryselect out the combined support plan of upper soil nailing and lower pile anchor. Bychanging the parameters in the process of calculation by the deep foundation pit7.0software, finally selected the optimal scheme.The article also scoped the use of theadvantages of combined supporting method and the existing shortcomings aresummarized, in the last it makes the prospect of foundation pit supporting and providesthe reference to deep foundation pit support work in the future.